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Science, Physics, Chemistry
8th
grade
Chemical Effects of Electric Current
10 questions
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- 1. Multiple Choice
Which one is the polluting waste generated by electroplating factories?
Used up electrodes
Electrolytes
Corroded Metals
- 2. Multiple Choice
When acidified water is electrolysed using carbon electrodes. What is produced at (+) and (-) electrodes.
(+) - Oxygen; (-) - Hydrogen
(+) - Oxygen; (-) - Carbon
(+) - Hydrogen (-) - Oxygen
- 3. Fill in the Blank
LED stands for
- 4. Multiple Choice
Select the poor conductors of electricity
Honey
Plastic
Vinegar
Distilled Water
- 5. Multiple Choice
We can electroplate plastic on iron.
True
False
- 6. Multiple Choice
To electroplate silver on Copper jewellery, the electrolyte that can be used is:
Copper Sulphate
Silver Nitrate
Ammonium Chloride
Sodium Chloride
- 7. Multiple Choice
In a conducting liquid electricity is conducted with the help of :
Proton
Neutron
Electron
Ions
- 8. Multiple Choice
During electrolysis the positively charged ions travel towards Cathode.
True
False
- 9. Fill in the Blank
During electroplating ________ (electrode) reduces in size and ________(electrode) increases in size.
- 10. Multiple Choice
Bicycle bells and wheel rims are electroplated with which metal?
Tin
Nickle
Chromium
Silver
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